Check out NEWS.txt for more info, including on how to upgrade your cluster.

Here's a snippet of all the new features:

***********************************
New Features in Brisk 1.0 Beta 2
***********************************
The following new features have been added in this release. For more
information on these features, see the Brisk Jira Project
(https://datastax.jira.com/browse/BRISK).

BRISK-152
Add a second HDFS layer in CassandraFS for long-term data storage. This is
needed because the blocks column family in CFS requires frequent compactions -
Hadoop uses it during MapReduce processing to store small files and temporary
data. Compaction cleans this temporary data up after it is not needed anymore.
Now there is the cfs:/// and cfs-archive:/// endpoints within CFS. The blocks
column family in cfs-archive:/// has compaction disabled to improve performance
for static data stored in CFS.

***********************************
Major Fixes in Brisk 1.0 Beta 2
***********************************
Brisk 1.0 Beta 2 also incudes the following major fixes. For details on all fixes in Beta 2, see the Brisk Jira Project (https://datastax.jira.com/browse/BRISK).

BRISK-126 Remove multiple slf4j warnings

BRISK-203 Use batchMutate instead of insert in HiveCassandraOutputFormat